So there is a hyperlink that you click on http://www.red-gate.com/SupportCenter/Content/SQL_Source_Control/knowledgebase/SoC_Using_TFS2012
which provides some instructions.
Following the instructions, the resulting configuration file looks as follows:
<EngineOptions version="3" type="EngineOptions">
When you link the datbase TFS be sure you use a URL that looks like:
Otherwise you will get nothing but errors.
Otherwise you will get an error.
Hope this helps.